{
  "id": "2201.11135",
  "version": "v1",
  "published": "2022-01-26T19:00:01.000Z",
  "updated": "2022-01-26T19:00:01.000Z",
  "title": "HOLISMOKES. VIII. High-redshift Strong Lens Candidates from the Hyper Suprime-Cam Subaru Strategic Program",
  "authors": [
    "Yiping Shu",
    "Raoul Cañameras",
    "Stefan Schuldt",
    "Sherry H. Suyu",
    "Stefan Taubenberger",
    "Kaiki Taro Inoue",
    "Anton T. Jaelani"
  ],
  "comment": "13 pages, 7 figures + appendices, submitted to A&A. Comments are welcome",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We carry out a dedicated search for strong-lens systems with high-redshift lens galaxies with the goal of extending strong lensing-assisted galaxy evolutionary studies to earlier cosmic time. Two strong-lens classifiers are constructed from a deep residual network and trained with datasets of different lens redshift and brightness distributions. We classify a sample of 5,356,628 pre-selected objects from the Wide layer fields in the second public data release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) by applying the two classifiers to their HSC $gri$-filter cutouts. Cutting off at thresholds that correspond to a false-positive rate of $10^{-3}$ on our test set, the two classifiers identify 5,468 and 6,119 strong-lens candidates. Visually inspecting the cutouts of those candidates results in 735 grade-A/B strong-lens candidates in total, of which 277 candidates are discovered for the first time. This is the single largest set of galaxy-scale strong-lens candidates discovered with HSC data to date, and nearly half of it (331/735) contains lens galaxies with photometric redshifts above 0.6. Our discoveries will serve as a valuable target list for ongoing and scheduled spectroscopic surveys such as the Dark Energy Spectroscopic Instrument, the Subaru Prime Focus Spectrograph project, and the Maunakea Spectroscopic Explorer.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-01-26T19:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hyper suprime-cam subaru strategic program",
      "high-redshift strong lens candidates",
      "prime focus spectrograph project",
      "strong lensing-assisted galaxy evolutionary"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}